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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文本格式化</title>
    <style>
p{
    color: brown;
}
h3{
    color: black;
}
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<body>
    <h1>文本格式化</h1>
    <strong>加黑字体</strong><br>
    <i>斜体字体</i><br>
    <s>删除字体</s><br>
    <u>下划线</u><br>
    <h2>链接标签</h2>
    <a href="http://www.baidu.com">百度</a>
    <p>空标签#</p>
    <a href="#">空标签</a>
    <p>target是文件打开网页选择</p>
    <p>_self是当前网页打开</p>
    <a href="http://www.baidu.com" target="_self">百度</a>
    <p>_blank是新建网页打开</p>
    <a href="http://www.baidu.com" target="_blank">百度</a>
    <p>_parent是上一级网页打开</p>
    <a href="http://www.baidu.com" target="_parent">百度</a>
    <p>_top是打开并占用全部窗口</p>
    <a href="http://www.baidu.com" target="_top">百度</a>
    <h3>这是个标题</h3>
    <p>这是一个段落</p>
    <h3></h3>
    


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